Bike Trainer Thru Axle Skewer Durable aluminum alloy, CNC machined for precise fit and long lasting use Versatile compatibility: designed for 12x142 148 mm rear spacing on P5/P1.75 bicycles, suitable for a wide range of indoor riding setups Adjustable width: supplied with 3 aluminum spacers of different thicknesses to easily fit bicycles with different rear axle widths Engineered for security: provides a secure, stable connection between bicycle and trainer during indoor riding performance attributes: strong clamping, reduced frame stress, and reliable alignment for trainer workouts Use scenarios Setting up road or mountain bikes on an indoor trainer for regular training sessions, with a secure and stable connection Quickly swapping between bikes with different rear axle widths without tools, thanks to adjustable spacers Conducting intensity interval workouts where stable alignment and consistent engagement are important for safety and performance Specifications and materials Material: aluminum alloy Machining: CNC processed for precision Compatibility: 12x142 148 mm rear spacing, P5/P1.75 bicycles Spacers: 3 aluminum spacers of varying thicknesses included for adjustable width